Olympus E-3 vs Olympus E-330: read noise comparison

Input-referred read noise at base ISO: Olympus E-3 24.1 e⁻ (ISO 100), Olympus E-330 15.4 e⁻ (ISO 100).

Olympus E-3

The Olympus E-3 was measured at 16 ISO settings from ISO 100 to ISO 3200. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 3.58 DN, or 24.1 electrons at the sensor. From ISO 400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 27,087 electrons; unity gain is around ISO 670.

Olympus E-330

The Olympus E-330 was measured at 13 ISO settings from ISO 100 to ISO 1600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 2.07 DN, or 15.4 electrons at the sensor. From ISO 100 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 29,931 electrons; unity gain is around ISO 740.

Olympus E-3 vs Olympus E-330 read noise table

ISO	Olympus E-3	Olympus E-330
100	3.580	2.071
125	4.377	2.621
160	5.389	3.227
200	6.364	3.784
250	7.674	4.691
320	10.196	5.979
400	6.681	7.516
500	8.398	9.383
640	11.158	12.126
800	13.454	14.723
1000	16.679	19.293
1250	20.821	23.588
1600	26.355	29.446
2000	33.128	–
2500	40.504	–
3200	48.168	–

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